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Maternal Factors Associated with Small-for-Dateness Among Twins

Published online by Cambridge University Press:  01 August 2014

Denis Hemon ,
Colette Berger  and
Philippe Lazar
Denis Hemon*
Affiliation:
Unité de Recherches Epidémiologiques et Statistiques sur l'Environnement et la Santé, INSERM U 170, Villejuif, France
Colette Berger
Affiliation:
Unité de Recherches Epidémiologiques et Statistiques sur l'Environnement et la Santé, INSERM U 170, Villejuif, France
Philippe Lazar
Affiliation:
Unité de Recherches Epidémiologiques et Statistiques sur l'Environnement et la Santé, INSERM U 170, Villejuif, France
*
INSERM, U 170 Statistiques, 16 Avenue P. V. Couturier, 94807 Villejuif Cedex, France

Abstract

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The maternal risk factors that correlate with small-for-dateness among twins have been analyzed using a sample of 659 twin pairs and a matched sample of singletons. Non-marital status, job involvement, and the previous delivery of a low-birth weight (<2,500g) infant present a negative interaction with twinning, as low gestational age-adjusted birth weight does not correlate significantly with these risk factors among twin gestations, while it does among singleton gestations. On the other hand, the effects of parity, habitual maternal weight, smoking during pregnancy, and twinning are additive on gestational age-adjusted birth weight. Indeed, the decrease in adjusted birth weight associated with these risk factors is of the same magnitude among twins and singletons and is statistically significant in both cases. These findings suggest that exposure of twin pregnancies to these latter risk factors, and particularly to smoking during pregnancy, can lead to the delivery of newborns with extremely low birth weights.

Keywords

TwinsBirth WeightEpidemiologySmoking
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 31 , Issue 3-4: Special Issue on Twin Pregnancies , July 1982 , pp. 241 - 245
Copyright
Copyright © The International Society for Twin Studies 1982

References

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